Filter cleaning mechanism



G. B. REEVES FILTER CLEANING lvlECHANIsM June 13, 1950 2 Sheets-Sheet 1 Filed April 5, 14946 lllllllllll lllillll Izwezaow:

24,9913. Reeves,

c/:zwzaeys June 13, 1950 G. B. REEVES `FILTER CLEANING MECHANISM Filed April 5, 194e 2 Sheets-Sheet 2 (490:I4 a. Reeves,

Patented `une 13, 1950 @PATENT ortica Application April 5, 1946, Serial No.'659,850

(c1. isi-ti) 3 'Clijl'l This' invention relates to filter cleaning mechaiii'siii f'th'e receiver of' a pneumatic cardstripper and the' principal' object'oi the invention isnt() vi'de 'r'neaiis Afr e'iect'ively' clcaningtheufilter With'itf removing'the filter 'from the receiver, siial'vreciv'ers for pneumatic *card1 cleaning mechanism Vcomprise an h'rriietically closed lcaws-` in'g' Having" a Waste chamber intovlwhich the biis'aiid dust stripped lfrom a carding cylinder are drawn by suti, the Wall or Walls of the Waste chamber" being' "provided vvithda screenr screens" Iidr" establishing communication With a dust @nannten` y ,Y x M suitableltris'lcated in the dustuchamber and the air which is exhliiste'd in the Ycasing is diari/ii 'through 4th filter, 'the dustv chamber, the 'W'ast c a'ibei" and the suct n head of the lt'e'r. Byrasn f this construe theiibrousv material' which is' stnpp'dicm the" cylinder' deposited' in thea-asie charmer; the dust ii'nivvnl through' the inte the' dan chamber; and tli`dl`s`f" IeI'ii/'d the'iteastlie ug laden airisdralwnth'i it. Iii sch operation odffthev stripping'r'rfeenais die' inateiai'oftne dust accumulates" pn tu nner" cib'ggirg' the' itrstics" t'iiefef S that" the' d'-igree"I Ouflvailuri with-in the receiver and' section head eventua-iiy reduced" and' die" operation off the stripping' correspcndin'gly'rei'derd ineli'etivet b nerewforein Ha'sfbeen ec'e'ssyrduhtiy'to remove'tli'e iter" and'claiiit. By reason' ofd the pr ede-ctiveiyi cleaned without renie-fing it" fc the receiver thereby saving tlietiii'e whichvo'thervvis'eiA @nab ng the strippertope'rate :fiore effectively,"

and substantially' cn'ti'niusly. This" i's' accomplished i1`1"t`h'e"`presentY invention thro'igli' tl'fe"'ceiver promptly intrigducing airi'ude'rvatiicspheric' pressre through the lter into'th'eparitial va'ciiir' then existing in the airevacuated receiver in a reverse direction to the normal suction-induced iiowuof the air, thereby aus'ehangiri'gt the* materialwnin" is `a'eminimated upon the filter into the dust chamber.'

A further object'of the-invention-is to provide lter-cieaning mechanism of the character-above described which can be readily applied to usual standard receivers of pneumatic-stri'ppingtmeclanismfwitho'ut modification of the'mechanism-103Ey the receiver. a

These and other objects and`V featuresof'lthe invention will more full-y. appear from the the following description and the accompanying drawings and'"will be particularlypointed outin'the claims.t v

Fig. 1 is a view, mainly in longitudinal section,

esenti'- inveati'ontheniter can be eaiiy" and" Strinners:

Fig. 2 is an enlarged detail vertical sectional/'f f vievv online -2-2,Fig. 1, and; Flg. 3Y is a1 vertical sectional View on line 3"'-3 Fig. 2n viewed-from the leittoward the right.

Thewreceiver illustrated inthe accompanying drawings lis one of a conventional type comprising a preferably vertical cylindrical casing I having a; preferably"ylindricai Wall hermetically mounted upon a", itable basep'a7 and having a dcmeshaped top il.` metically secured to the wall-i with at pip 4* xtending'into the casing adaptedto be connectedibya'usual flexible pipe 5 to the suction. head oi'lthercard stripper. The lower end of the pipe inexteiidsl through a horizom';a ll s creenj securedatni-ts periphery to the junctionoffthe dome and vthe cylindrical Walla" Av solid;A partition 7,;Which extends transversely across theviov/er end of the partition," divides the casingginto anupperwaste chamber 8 andv a; lower dust 'chamber 9. Suitable means are pro-1 vided for establishing"communication between' the Waste.cha-Inliner1 8Y and y--tiie' dustf'chamber 9 thro/ugh,thecscreenl-irior forming the Wall of the* Waste chamber. As iilustrated herein a plurality of pipesl'ii arqmounted upon* and extend through` pipe 5 towthe suction head; drawsthemateria'l" strippedfrointhe card;` into the Waste chamber in which the brous material is deposited While the dust is drawnft ojugnthev screenjwall of @what Chamberlf. chamber) wliere ..the. granular material of the" duvls't-lvaden currntgis deposited upon theiilte'rz inthe construction;illustrated the filter'com prisesacylindrical Wire-screen l i having a closedend i2 and` anannularrend- I8 `providedwith ari'Y inwardly beveled edge i5 adapted to` bev seated uponja corriplementaryibase it of a conicalspider;y having a, flange i6 which is iixedly secured tothe? l Wall' i of the v casingf- A'rod Iig, Whichfis.securedv t0 th api Q Afthgey c cn-icai spider, 'extendsaxiallyf l' tiigfqgigi; @ne hea@ Al2 or the eiterfand 1er/provided with aA scrap/ threaded end vvhich isy engaged clamping nut lgwhich .upon being?? setvup"v/llwclainpwthe annular end Wall i3 ci?N the y-iridric l nlterwscreeniiirmlyy upon' the;

Sl5id1j fi: cylindrical @fabric filter bagl i 9 tsV uponi an'd is releasabiy secured to the cylindrical filter of'the' lfil'tzln'dV is provided vvitha converging end 2| which is connected to the rod Il thereby d he pipes yiii into'thedust' v liflfllelm with. ,and spaced from: tiieains f the spiderwnarly'to the opposite-vendV1 forming a guide by means of which the filter can be readily assembled upon the spider.

A suction conduit 22, which is suitably secured to the casing, communicates axially with the adjacent end of the lter as in usual constructions and extends therefrom to a suitable pump or other suction means as in usual constructions.

The present invention consists in providing means for shutting on the suction applied through the conduit 22 preferably in proximity to the casing l and providing means for introducing air under pressure into said conduit intermediate of the shut-off valve and the casing I. In the present construction a preferably manually operable shut-oli' valve 23 is introduced in the conduit 22 a short distance from the casing I and a pipe '2li communicates with the conduit 22 intermediate of the shut-off valve 23 and the casing i. The pipe 24 desirably has detachably secured to its upper end a cylindrical screen 25 and the pipe is provided with a manually operable valve 26 preferably in proximity to the screen 25, the handles 2l and 28 of the respective valves being located in convenient reach of an operator.

In the operation of the device suction is continuously maintained in the conduit 22 leading to the pump or other suction-creating means and the shut-on" valve 23 is normally maintained in open position for operating the card stripper. When it is desired to clean the lter the shut-olf valve 23 is moved to closed position, the valve 26 in the pipe 24 is then opened, thereby admitting air under atmospheric pressure to rush through the pipe 2li, and the section of the conduit 22 intermediate of the shut-off valve and the casing into the cylinder in which partial vacuum is maintained after the shut-olf valve is closed. The air thus rushing into the filter passes substantially uniformly through the meshes of the cylinder screen and the filter bag enclosing it thereby discharging the material which has accumulated upon the lter bag into the dust chamber where it settles to the bottom thereof and thereafter can be scraped out.

The casing l of the receiver is provided with suitable upper and lower doors 29 and 30 adapted to provide access to the Waste chamber 8 and the dust chamber 9 so that the iibrous waste and the dust can be removed from the respective chambers.

bodiments of the invention shown and described herein are of an illustrative character and that the present invention can be applied to other types of filtering mechanism or receivers of other constructions than that shown herein within the spirit and scope of the following claims.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. In combination with a pneumatic card stripper receiver having an hermetically closed casing containing a waste chamber communicating with the stripper head and having a screen in its wall, a dust chamber communicating with said waste chamber through said screen, a lter in said dust chamber and a suction conduit mounted on said casing leading from the chamber of said filter to suction-producing means mechanism for cleaning the filter comprising a shut-off Valve in said conduit in proximity to said casing, an auxiliary pipe communicating with said suction conduit between said shut-olf It will be understood that the particular emvalve and said casing and a valve in said pipe adapted to be opened after the shut-off valve is closed thereby to admit air under atmospheric pressure into the evacuated receiver operable to discharge material accumulated on the lter into the dust chamber.

2. In combination with a pneumatic card stripper receiver having an hermetically closed casing containing in the upper portion thereof a Waste chamber communicating with the card stripper head and having a screen in a wall thereof, a, dust chamber below said waste chamber communicating with said waste chamber through said screen, a cylindrical filter screen in said dust chamber extending diametrically thereof covered by a filter cloth, a suction conduit mounted in said casing in axial alinement with said screen cylinder communicating with the chamber thereof and leading to a suction means mechanism for cleaning the filter comprising a shut-off valve in said suction conduit in prox- 'imity to said casing, an auxiliary pipe mounted on and communicating with said suction conduit between the shut-orf valve and casing, and a normally closed valve in said pipe adapted to be opened upon closing of said shut-off valve to admit air under atmospheric pressure into the evacuated chamber of' the receiver operable to discharge material accumulated on the filter cloth into the dust chamber.

3. In combmation with a pneumatic card stripper receiver having an hermetically closed casing containing in the upper portion thereof a waste chamber communicating with the card stripper head and having a screen in a wall thereof, a dust chamber below said waste chamber communicating with said Waste chamber through said screen, a cylindrical filter screen in said dust chamber extending diametrically thereof detachably mounted on the wall of said casing covered by a filter cloth, a suction conduit mounted on said casing in axial alinement with said screen cylinder communicating with the chamber thereof and leading to a suction means mechanism for cleaning the lter comprising a shut-off valve in said suction conduit in proximity to said casing, an auxiliary pipe mounted on and communicating with said conduit between the shut-off 'valve and the casing having a screen-covered upper inlet end, and a normally closed valve in said pipe below said screen adapted to be opened upon closing of said shut-olf valve to admitair under atmospheric pressure into the evacuated chamber of the receiver operable to discharge material accumulated on the lter cloth into the dust chamber.

' GEORGE B. REEVES.

REFERENCES CITED The following references are of record ln the lile of this patent:

UNITED STATES PATENTS Number Name Date 985,747 Merrell Feb. 28, 1911 1,784,339 Clasen et al. Dec. 9, 1930 1,843,639 Hansen Feb. 2, 1932 2,226,630 McCord Dec. 31, 1940 2,314,858 Forsberg Mar. 23, 1943 FOREIGN PATENTS Number Country Date 693,467 Germany July 10, 1940 205,462 Switzerland Sept. 1, 1939 Certificate of Correction Patent No. 2,511,598 June 13, 195o GEORGE B. REEVES It is hereby certified thaterrors appear in the above numbered patent requiring correction as follows:

In the grant, line 3, and in the heading to the printed specification, line 5, for a eorporatlon of Massachusettsf. read a trust of Massachusetts;

and that the said Letters Patertashould be read with these corrections therein that the same may conform to the record of the'case in the Patent Office. Signed and sealed this 19th day of September, A. D. 1950.

THOMAS F. MURPHY,

Assistant Oammz'ssz'oner of Patents. 

